joshschmelzle

To slow down your video, you have to use a multiplier greater than 1:

ffmpeg -i input.mkv -filter:v "setpts=2.0*PTS" output.mkv

For example, to double the speed of the video, you can use:

ffmpeg -i input.mkv -filter:v "setpts=0.5*PTS" output.mkv

Source

joshschmelzle

Ways to remap caps lock to control on Windows 10

These methods in this gist worked for me on my U.S.-based keyboard layouts. I am unsure about other layouts. If you have problems, revert your changes; delete the registry key you created (and reboot).

Update: you should probably scroll down to approach 4 where I suggest using Microsoft PowerToys Keyboard Manager.

Approach 1. Manually through regedit

Navigate to and create a new binary value in HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Keyboard Layout named Scancode Map.

joshschmelzle

You've probably stumbled upon this researching how to remove the Xbox Game Bar. This gist includes a few different methods you can try. Please note that some of these first options are probably not be available unless you are running an older version of Windows 10.

EDIT: make sure to check out the comment below from @nmhung1985 which seems to be working for most folks.

Uninstalling/Removing the Game Bar (old Windows 10 build GUI options)

(this is no longer an option on any recent Windows 10 build)

1. Press Windows Key or click on the Start menu.
2. Start typing Xbox or Game Bar, until you get the Xbox Game Bar app to appear in the results.

joshschmelzle

How to list all connected SSH sessions

I was curious how to view sessions on a Linux box I had at my desk. Similar to the session table on an Aruba controller (show loginsessions). Here are some ways you can list active SSH sessions; some commands return more output than others. This applies to most modern Linux boxes or say a WLAN Pi.

All examples below are using 2 MobaXterm user sessions from a Windows machine to a Linux 4.14.42-sunxi64 aarch64 (NanoPi NEO2).

w

wlanpi@wlanpi:~$ w

joshschmelzle

Using tftpd-hpa - HPA's tftp server on Ubuntu 18.04.3 LTS to host a tftp server.

install tftp server

$ sudo apt install tftpd-hpa

configure tftp server

create new directory for tftp.

joshschmelzle

name: Get Output from Docker

on:
  workflow_dispatch:
  push:
    branches: [ main ]

jobs:
  build:
    runs-on: ubuntu-latest

joshschmelzle

ffmpeg -i input.mp4 -c copy -ss 00:04:25.000 -to 00:09:25.000 output.mp4

joshschmelzle

macOS/BSD specific

Thanks @seldo and @NurmiWilliam

sudo lsof -iTCP -sTCP:LISTEN -n -P | awk 'NR>1 {print $9, $1, $2}' | sed 's/.*://' | sort -u | while read port process pid; do echo "Port $port: $(ps -p $pid -o command= | sed 's/^-//') (PID: $pid)"; done | sort -n

git-sweep.sh

joshschmelzle

To save the output of a command on the Windows clipboard, add a pipe* (|) operator to your command followed by the clip command.

Examples

dir | clip - copy the listing of current folder contents to the clipboard.

tree | clip - copy a recursive directory structure to the clipboard.

pwd | clip - copy the present working directory to the clipboard.

joshschmelzle

iPerf3 service with systemd

• Create file at /etc/systemd/system/iperf3.service with contents from iperf3.service

systemctl

• To start a service at boot, use the enable command: sudo systemctl enable iperf3.service
• To view the service status, use the status command: sudo systemctl status iperf3.service
• To start the service, use the start command: sudo systemctl start iperf3.service
• To stop the service, use the stop command: sudo systemctl stop iperf3.service